div,input{
	font-family: "迷你简菱心";
	font-size: 20px;
	text-align: center;
}
body{
	background-image: url(bg.jpg);
	background-repeat: no-repeat;
}
#nav{
	position: relative;
	width: 500px;
	height: 50px;
	margin: 50px auto 0 auto;
	border: 1px solid #fff;
	line-height: 50px;
	color: #6C6F81;
}

.big{
	width: 500px;
	height: 500px;
	margin: 0 auto;
	border: 1px solid #fff;
}
.big div{
	position: relative;
	width: 49%;
	height: 49%;
	float: left;
	border: 1px solid #fff;
}
.big div:hover{
	cursor: pointer;
}
.big img{
	position: relative;
	top:220px;
	width: 100px;
	height: 33px;
}
#mask{
	opacity: 0.9;
}
#btn{
	color: #6C6F81;
	position: relative;
	width: 500px;
	height: 50px;
	margin: 0 auto ;
	border: 1px solid #fff;
}
/*遮罩层*/
.mask{
	position: absolute;
	background-color: #fff;
	opacity: 0.2;
	width: 100%;
	height: 100%;
}
.left{
	height: 100%;
	width: 50%;
	float: left;
}
/*按钮*/
.btn{
	position: relative;
	left: 50px;
	top:5px;
	border: 1px solid #fff;
	border-radius: 50%;
	width: 150px;
	height: 40px;
	line-height: 40px;
}
.btn:hover{
	cursor: pointer;
	background-color: #C2C3C7;
}
#nav #end{
	display: none;
	position: absolute;
	left: 150px;
	top:200px;
	width: 200px;
	height: 150px;
	border:1px solid #fff;
	border-radius: 10%;
	line-height: 20px;
}
#timeChange{
	position: absolute;
	left:450px;
	top:12px;
}
#timeChange img{
	position: absolute;
	width: 30px;
	height: 30px;
}